document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=80921>Question 80921</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you please help me with this question I am totally clueless as to how to answer this question the working that is.\r<BR>\n" );
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document.write( "Given a line containing the points (1,3) , (2,4) , (3,5) determine the slope- intercept form of the equation, give one additional point on this line and graph the function.\r<BR>\n" );
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document.write( "Thank you in advance.\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #82190 by </B><A HREF=/tutors/aboutme.mpl?userid=mathnard><B>mathnard(10)</B></A><img src=\"/images/stars/stars-05.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mathnard><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=82190\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The previous solution to this problem is 100% INCORRECT.  The slope is NOT 2, and the equation of the line was never given.  \r<BR>\n" );
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document.write( "Slope-intercept form of the line means <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=mx%2Bb ALIGN=MIDDLE  ALT=\"y=mx%2Bb\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "where m means the slope and b means the y-intercept.\r<BR>\n" );
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document.write( "to find the slope, we will use 2 points and the slope formula:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m=%28y2-y1%29%2F%28x2-x1%29 ALIGN=MIDDLE  ALT=\"m=%28y2-y1%29%2F%28x2-x1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Let's use the two points (1,3) and (2,4) in the slope formula to find the slope:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m=%284-3%29%2F%282-1%29 ALIGN=MIDDLE  ALT=\"m=%284-3%29%2F%282-1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m=1%2F1=1 ALIGN=MIDDLE  ALT=\"m=1%2F1=1\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now let's plug in what we know about the line:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=1x%2Bb ALIGN=MIDDLE  ALT=\"y=1x%2Bb\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Again, pick a point: how about (3,5)? and plug it in so that we can find b:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5=1%2A2%2Bb ALIGN=MIDDLE  ALT=\"5=1%2A2%2Bb\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5=3%2Bb ALIGN=MIDDLE  ALT=\"5=3%2Bb\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2=b ALIGN=MIDDLE  ALT=\"2=b\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now that we know what b is, let's finish writing the equation of the line:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=1x%2B2 ALIGN=MIDDLE  ALT=\"y=1x%2B2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "which is the same thing as saying<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=x%2B2 ALIGN=MIDDLE  ALT=\"y=x%2B2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "To find another point on the line, pick a new x value for a point, maybe 4, maybe 100.  We could pick either.  I'm going to use 4, though because it's smaller, and probably easier to use.  (4,y) we still don't know the y.  We will find it by plugging in 4 for x to our equation:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=4%2B2 ALIGN=MIDDLE  ALT=\"y=4%2B2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=6 ALIGN=MIDDLE  ALT=\"y=6\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "so the point (4,6) is on the line. </SPAN>\n" );
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